WHEN TEMPERATURES BEGIN TO DROP, STAY WARM WITH THE KING'S XKG FOUNDATION MERINO BOTTOM.The King's XKG Foundation Merino Bottom features 17.5 micron 100% Merino wool that functions in any condition. While the tightly sewn fine wool fibers keep you warm, it also keeps you cool in the heat with its excellent breathability. The Merino bottom comes in Olive and is the foundation layer bottom for your XKG system.FEATURES 100% merino wool Moisture wicking quick dry Flatlock stitched seams Natural odor control Ultra-breathable no-itch comfort Excellent warmth to weight ratio Elastic waistband